EP3681740B1 - Motor vehicle wheelset anti-roll device with actuating means operated by a hydraulic control circuit - Google Patents

Motor vehicle wheelset anti-roll device with actuating means operated by a hydraulic control circuit Download PDF

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Publication number
EP3681740B1
EP3681740B1 EP18772849.8A EP18772849A EP3681740B1 EP 3681740 B1 EP3681740 B1 EP 3681740B1 EP 18772849 A EP18772849 A EP 18772849A EP 3681740 B1 EP3681740 B1 EP 3681740B1
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EP
European Patent Office
Prior art keywords
state
fluid reservoir
fluid
return means
output
Prior art date
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Application number
EP18772849.8A
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German (de)
French (fr)
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EP3681740A1 (en
Inventor
Alan CAVAREC
Philippe Germain
Bruno PERRÉE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bwi France SASU
PSA Automobiles SA
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Bwi France SASU
PSA Automobiles SA
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Publication of EP3681740A1 publication Critical patent/EP3681740A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars
    • B60G21/0551—Mounting means therefor
    • B60G21/0553—Mounting means therefor adjustable
    • B60G21/0556—Mounting means therefor adjustable including a releasable coupling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
    • B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
    • B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
    • B60G21/055—Stabiliser bars
    • B60G21/0551—Mounting means therefor
    • B60G21/0553—Mounting means therefor adjustable
    • B60G21/0558—Mounting means therefor adjustable including means varying the stiffness of the stabiliser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
    • B60G21/10—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces not permanently interconnected, e.g. operative only on acceleration, only on deceleration or only at off-straight position of steering
    • B60G21/106—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces not permanently interconnected, e.g. operative only on acceleration, only on deceleration or only at off-straight position of steering transversally
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/13—Torsion spring
    • B60G2202/135—Stabiliser bar and/or tube
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/413—Hydraulic actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/41—Fluid actuator
    • B60G2202/414—Fluid actuator using electrohydraulic valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/44—Axial actuator, e.g. telescopic
    • B60G2202/441—Axial actuator, e.g. telescopic where axial movement is translated to rotation of the connected end part

Definitions

  • the invention relates to anti-roll (or anti-roll or even stabilization) devices fitted to certain motor vehicles.
  • an anti-roll (or anti-roll or even stabilization) device is equipment comprising a bar whose opposite ends are coupled respectively to right and left wheels of a train. a vehicle (car) via two connecting rods.
  • Such a device is mainly stressed when the vehicle is rolling in a bend or on a traffic lane which is degraded asymmetrically with respect to its longitudinal axis.
  • the bar In a bend, the bar is stressed in torsion and in bending to maintain the attitude of the vehicle as much as possible, and therefore the higher its stiffness, the more useful it is.
  • the bar In the presence of degradation, the bar partially transmits the irregularity of the traffic lane undergone by one of the wheels of a train to the other wheel of this same train by a phenomenon of "rolling back", and therefore the higher its stiffness, the more it induces a deterioration in comfort.
  • the degradation of comfort induced by the anti-roll device can be varied according to the life situations encountered by adding to each rod a hydraulic cylinder coupled to a fluid circuit comprising a solenoid valve, non-return valves and a fluid reservoir for the compensation of volume variations induced by the movements of the piston of the hydraulic cylinder.
  • a fluid circuit comprising a solenoid valve, non-return valves and a fluid reservoir for the compensation of volume variations induced by the movements of the piston of the hydraulic cylinder.
  • Each fluidic circuit is here relatively uncomplicated, but the presence of two fluidic circuits increases the overall size and the price.
  • we end up with four solenoid valves we end up with four solenoid valves. However, the greater the number of solenoid valves, the higher the risk of breakdown or malfunction and the higher the electrical consumption.
  • the hydraulic circuit does not make it possible to ensure that the hydraulic jack is in the neutral position (in which it does not supply any force) when it is placed in a blocked state (prohibiting a variation in length).
  • the object of the invention is therefore in particular to improve the situation.
  • an anti-roll device intended to equip a motor vehicle train having right and left wheels, and comprising a bar capable of being coupled to these right and left wheels via two rods.
  • the invention also proposes a motor vehicle comprising at least one train comprising right and left wheels coupled via an anti-roll device of the type presented above.
  • the object of the invention is in particular to propose an anti-roll (or anti-roll or even stabilization) device DA intended to equip a train of a motor vehicle.
  • the motor vehicle is a car. But the invention is not limited to this type of motor vehicle. It relates in fact to any type of motor vehicle comprising at least one set of wheels to be equipped with an anti-roll device.
  • the train is intended to be installed in a front part of a motor vehicle.
  • the invention also relates to the rear axles of motor vehicles.
  • an anti-roll device DA intended to equip a wheel set of a motor vehicle (here a car).
  • an anti-roll device DA according to the invention, comprises at least one anti-roll bar BA, first B1 and second B2 connecting rods, means of action MAC and a hydraulic control circuit CC.
  • the bar (anti-roll) BA is adapted to be coupled to the right and left wheels of an undercarriage of a motor vehicle, via the first B1 and second B2 connecting rods. It is also coupled to the body of the vehicle, for example via bearings PB, as illustrated without limitation in the figure 1 .
  • the (anti-roll) bar BA has a general U-shape. But it could have other shapes.
  • the connecting rod Bj / end E1j coupling can be made by a ball joint or pivot connection, for example.
  • the bar (anti-roll) BA comprises first BR1 and second BR2 arms which are independent of one another, and each comprise first E1j and second E2j ends.
  • Each first end E1j is capable of being coupled to one of the right and left wheels of a train via one of the rods Bj.
  • the link rod Bj / first end E1j coupling can be made by a ball joint or pivot connection, for example .
  • the second ends E2j are coupled to the means of action MAC.
  • the value 1 of the index j designates the right side, while the value 2 of the index j designates the left side. But the reverse is possible.
  • the MAC means of action are part either of one of the rods Bj, as illustrated in the figure 1 , or bar BA, as shown in figure figure 2 .
  • these means of action MAC comprise a housing CR and a piston PI.
  • the housing CR defines a chamber CH which is subdivided into first P1 and second P2 parts of variable volumes by a piston PI fixedly fixed to a rod T.
  • the housing CR comprises a first input-output ES1 which communicates with the first part P1 of the chamber CH, a second input-output ES2 which communicates with the second part P2 of the chamber CH, and an intermediate input-output ESI which communicates with the first part P1 or the second part P2 of the chamber CH according to the position of the PI piston.
  • the housing CR and the piston PI (with its rod T) define a sort of jack with three inputs-outputs ES1, ES2 and ESI.
  • the piston PI comprises a peripheral edge BP having a thickness e strictly greater than a corresponding dimension of the intermediate inlet-outlet ESI, so that fluid cannot enter or leave through the intermediate inlet-outlet ESI of the chamber CH when the piston PI is placed in front of this intermediate input-output ESI.
  • the peripheral edge BP of the piston PI partially houses a seal JE having a thickness strictly greater than the corresponding dimension of the intermediate inlet-outlet ESI. This allows the joint JE to completely obstruct the intermediate inlet-outlet ESI when the piston PI is placed in front of this intermediate inlet-outlet ESI (and therefore halfway through).
  • the housing CR is fixedly fixed to a lower part of the first link B1, and the end of the rod T which is opposite the piston PI is fixedly fixed to an upper part of the first link B1.
  • the housing CR is fixedly secured to the second end E21 of the first arm BR1, and the end of the rod T which is opposite to the piston PI is fixedly secured to the second end E22 of the second arm BR2.
  • An inverted arrangement is also possible.
  • housing CR may, for example, have a circular cylindrical shape.
  • the housing CR and the piston PI can define a conventional actuator because they allow a variation, by translation of the piston PI with its rod T, of the length (or height) of the (first) connecting rod B1 when the latter ( B1) reacts to the demands of the train.
  • one of the rods Bj (here B1) constitutes a rod of variable length and controlled by a command
  • the other rod Bj' (here B2) has a fixed length and is therefore entirely conventional. .
  • the housing CR and the piston PI can define a vane jack or a screw jack, in particular a ball screw jack, for example, because they allow a variation, by a combination of a rotation and a translation of the piston PI with its rod T, of the relative rotation of the first arm BR1 with respect to the second arm BR2.
  • one of the two parts Pj (for example P1) constitutes a “stator chamber” while the other part (for example P2) constitutes a “rotor chamber”.
  • the two connecting rods Bj therefore have, here, a fixed length. They (Bj) are therefore conventional in that they lack the means of action MAC.
  • These means of action MAC can assume either a disengaged state or a locked state in any position of the piston PI, depending on respective current accessibility states of the first input-output ES1 and second ES2 and of the input -ESI intermediate output.
  • the term “accessibility state” means the possibility or impossibility for a fluid to enter through an inlet-outlet to enter a part of the crankcase chamber or to leave by an inlet-outlet to circulate in the DC control circuit.
  • the control circuit CC is hydraulic (and therefore is traversed by a fluid) and controls the states of accessibility of the inputs-outputs ES1, ES2 and ESI according to commands received.
  • the fluid can, for example, be an oil.
  • it may for example be a hydraulic oil or a shock absorber oil.
  • Each command received can, for example, be determined according to irregularities detected under the vehicle by a physical parameter sensor (such as an accelerometer) and/or an end of turn detected in front of the vehicle by observation means or by a satellite guidance system and/or the current speed of the vehicle.
  • a physical parameter sensor such as an accelerometer
  • each command received comes from control means MCT which may possibly form part of the anti-roll device DA.
  • they can be part of a vehicle computer and be responsible for determining in real time and dynamically, each command.
  • control circuit CC may comprise first non-return means MA1 and second MA2, at least one solenoid valve EVk and a fluid reservoir RF, as illustrated without limitation in the figures 3 to 7 .
  • the first MA1 and second MA2 non-return means are each coupled to at least one of the first ES1 and second ES2 input-output and intermediate input-output ESI.
  • these first MA1 and second non-return means MA2 can be arranged in the form of non-return valves. But this is not mandatory. Indeed, what is important is that they each allow fluid circulation in a single direction (here towards at least one of the inputs-outputs ES1 and ES2), but not in the opposite direction (namely here from at least one of the ES1 and ES2 input-outputs).
  • The/each solenoid valve EVk is coupled to at least one of the first ES1 and second ES2 input-outputs and intermediate input-output ESI, and optionally to at least one of the first MA1 and second MA2 non-return means, and can be placed either in a first state imposing the disengaged state of the MAC action means, or in a second state imposing the blocked state of the MAC action means.
  • the first P1 and second P2 parts of the chamber CH can be connected to each other and to the fluid reservoir RF by the control circuit CC, and consequently the length (or height) of the first connecting rod B1 can vary freely.
  • the/each solenoid valve EVk only authorizes evacuation of fluid from the chamber CH via the intermediate inlet-outlet ESI, and consequently the length (or height) of the first rod B1 cannot vary freely. It works similar to that of a hydraulic pawl and which makes it possible to have a position in equilibrium at mid-stroke when the piston PI is at the level of the intermediate input-output ESI.
  • the state (first or second) in which a solenoid valve EVk is placed is driven (or defined) by the command received by this solenoid valve EVk.
  • the fluid reservoir RF is responsible for compensating at least variations in volume induced by displacements of the piston PI, as well as possibly variations linked to the temperature.
  • control circuit CC described above can be arranged in different ways. Five of these ways are described below with reference respectively to the figures 3 to 7 .
  • control circuit CC places the first EV1 and second EV2 solenoid valves either in the first open state when the action means MAC must be placed in the disengaged state, or in the second closed state when the action means MAC must be placed in the state blocked. Consequently, in the disengaged state, the fluid circulates between the first P1 and second P2 parts of the chamber CH, as well as between the first P1 and second P2 parts and the fluid reservoir RF. In the blocked state, the fluid is prohibited from circulating not only between the first P1 and second P2 parts of the chamber CH, but also between the first P1 and second P2 parts and the fluid reservoir RF.
  • control circuit CC places the first EV1 and second EV2 solenoid valves either in the first open state when the means of action MAC must be placed in the disengaged state, or in the second state when the means of action MAC must be placed in the blocked state. Consequently, in the disengaged state, the fluid circulates between the first P1 and second P2 parts of the chamber CH, as well as between the first P1 and second P2 parts and the fluid reservoir RF. In the blocked state, the fluid is prohibited from circulating not only between the first P1 and second P2 parts of the chamber CH, but also between the first P1 and second P2 parts and the fluid reservoir RF.
  • control circuit CC places the solenoid valve EV1 either in the first open state when the means of action MAC must be placed in the disengaged state, or in the second state when the means of action MAC must be placed in the blocked state. Consequently, in the disengaged state, the fluid circulates between the first P1 and second P2 parts of the chamber CH, as well as between the first P1 and second P2 parts and the fluid reservoir RF. In the blocked state, the fluid is prohibited from circulating not only between the first P1 and second P2 parts of the chamber CH, but also between the first P1 and second P2 parts and the fluid reservoir RF.
  • the operation of this DC control circuit is identical to that described above with reference to the figure 5 , because only the internal arrangement of the solenoid valve EV1 is different.
  • This control circuit CC couples the first input-output ES1 and second ES2 and the intermediate input-output ESI to the fluid reservoir RF via the solenoid valve EV1 which comprises the first MA1 and second MA2 non-return means, which only allow a passage of fluid from the fluid reservoir RF to respectively the first ES1 and second ES2 inputs-outputs.
  • the port p1 is coupled to the first input-output ES1 and therefore to the first part P1 of the chamber CH.
  • the port p2 is coupled to the second input-output ES2 and therefore to the second part P2 of the chamber CH.
  • Port p3 is coupled to the ESI intermediate input-output.
  • the other ports p4 to p6 are coupled to the RF fluid reservoir.
  • the solenoid valve EV1 can take either a first open state associated with the disengaged state and in which the fluid circulates between the first P1 and second P2 parts and the fluid reservoir RF but does not circulate between the inlet- intermediate outlet ESI and the fluid reservoir RF, i.e. a second state associated with the blocked state and in which the fluid circulates from the fluid reservoir RF to the first P1 and second P2 parts of the chamber CH via respectively the first MA1 and second MA1 MA2 non-return means and circulates between the intermediate inlet-outlet ESI and the fluid reservoir RF.
  • control circuit CC places the solenoid valve EV1 either in the first open state when the means of action MAC must be placed in the disengaged state, or in the second state when the means of action MAC must be placed in the blocked state. Consequently, in the disengaged state, the fluid circulates between the ports p1 and p4 and between the ports p2 and p5, and therefore between the first P1 and second P2 parts of the chamber CH and the fluid reservoir RF, but it does not cannot circulate between the ports p3 and p6 in order to prohibit its circulation between the intermediate input-output ESI and the fluid reservoir RF.
  • the fluid flows from port p4 to port p1 via the first non-return means MA1, from port p5 to port p2 via the second non-return means MA2, and freely (in both directions) between the p3 ports and p6 and therefore the intermediate input-output ESI is directly coupled to the fluid reservoir RF.
  • the means of action MAC can be placed in the blocked state regardless of the position of the piston PI, which is particularly advantageous. But, if this placement in the blocked state takes place at the moment when the piston PI does not obstruct the intermediate input-output ESI, the piston PI will automatically reach a position of equilibrium at mid-travel in which it obstructs the intermediate input-output ESI. This is called self-centering.
  • fluid reservoir RF and/or the first MA1 and second MA2 non-return means and/or each solenoid valve EVk and/or the conduits can be external to the housing CR defining the chamber CH , as shown in the figures 3 to 7 , or else little (Fri) t be housed in a possible other casing in which is also housed the CR casing defining the CH chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Body Structure For Vehicles (AREA)

Description

L'invention concerne les dispositifs anti-dévers (ou anti-roulis ou encore de stabilisation) qui équipent certains véhicules automobiles.The invention relates to anti-roll (or anti-roll or even stabilization) devices fitted to certain motor vehicles.

Comme le sait l'homme de l'art, un dispositif anti-dévers (ou anti-roulis ou encore de stabilisation) est un équipement comprenant une barre dont les extrémités opposées sont couplées respectivement à des roues droite et gauche d'un train d'un véhicule (automobile) via deux biellettes.As those skilled in the art know, an anti-roll (or anti-roll or even stabilization) device is equipment comprising a bar whose opposite ends are coupled respectively to right and left wheels of a train. a vehicle (car) via two connecting rods.

Un tel dispositif est principalement sollicité lorsque le véhicule roule dans un virage ou sur une voie de circulation qui est dégradée de façon dissymétrique par rapport à son axe longitudinal. Dans un virage la barre est sollicitée en torsion et en flexion pour maintenir autant que possible l'assiette du véhicule, et donc plus sa raideur est élevée plus elle est utile. En présence d'une dégradation la barre transmet partiellement l'irrégularité de la voie de circulation subie par l'une des roues d'un train à l'autre roue de ce même train par un phénomène de « renvoi de roulis », et donc plus sa raideur est élevée plus elle induit une dégradation du confort.Such a device is mainly stressed when the vehicle is rolling in a bend or on a traffic lane which is degraded asymmetrically with respect to its longitudinal axis. In a bend, the bar is stressed in torsion and in bending to maintain the attitude of the vehicle as much as possible, and therefore the higher its stiffness, the more useful it is. In the presence of degradation, the bar partially transmits the irregularity of the traffic lane undergone by one of the wheels of a train to the other wheel of this same train by a phenomenon of "rolling back", and therefore the higher its stiffness, the more it induces a deterioration in comfort.

Comme cela est décrit dans le document brevet US 8,167,319 , on peut faire varier la dégradation de confort induite par le dispositif anti-dévers en fonction des situations de vie rencontrées en adjoignant à chaque biellette un vérin hydraulique couplé à un circuit fluidique comportant une électrovanne, des clapets anti-retour et un réservoir de fluide pour la compensation des variations de volume induites par les mouvements du piston du vérin hydraulique. Chaque circuit fluidique est ici relativement peu complexe, mais la présence de deux circuits fluidiques augmente l'encombrement global et le prix. De plus, lorsque le véhicule comprend deux trains de roues, on se retrouve avec quatre électrovannes. Or, plus le nombre d'électrovannes est élevé, plus le risque de panne ou de dysfonctionnement est élevé et plus la consommation électrique est élevée. En outre, plus le nombre d'électrovannes est élevé, plus on doit prévoir de faisceaux électriques pour alimenter en courant et en commandes ces électrovannes, et donc plus on augmente les coûts de fabrication et d'installation et la complexification de l'installation dans le véhicule et des algorithmes de génération des commandes des électrovannes. On connait encore du document JPS6364813A un autre dispositif anti-devers. Le document FR 2 786 133 A1 divulgue un dispositif anti-devers dont le verin est très proche de celui de l'invention.As described in the patent document US 8,167,319 , the degradation of comfort induced by the anti-roll device can be varied according to the life situations encountered by adding to each rod a hydraulic cylinder coupled to a fluid circuit comprising a solenoid valve, non-return valves and a fluid reservoir for the compensation of volume variations induced by the movements of the piston of the hydraulic cylinder. Each fluidic circuit is here relatively uncomplicated, but the presence of two fluidic circuits increases the overall size and the price. In addition, when the vehicle comprises two sets of wheels, we end up with four solenoid valves. However, the greater the number of solenoid valves, the higher the risk of breakdown or malfunction and the higher the electrical consumption. In addition, the greater the number of solenoid valves, the more electrical harnesses must be provided to supply current and commands to these solenoid valves, and therefore the more the manufacturing and installation costs increase and the complexity of the installation in the vehicle and of the algorithms for generating the commands of the solenoid valves. We still know of the document JPS6364813A another anti-roll device. The document FR 2 786 133 A1 discloses an anti-roll device whose actuator is very similar to that of the invention.

Par ailleurs, le circuit hydraulique ne permet pas de s'assurer que le vérin hydraulique est en position neutre (dans laquelle il ne fournit pas d'effort) quand il est placé dans un état boqué (interdisant une variation de longueur).Furthermore, the hydraulic circuit does not make it possible to ensure that the hydraulic jack is in the neutral position (in which it does not supply any force) when it is placed in a blocked state (prohibiting a variation in length).

L'invention a donc notamment pour but d'améliorer la situation.The object of the invention is therefore in particular to improve the situation.

Elle propose notamment à cet effet un dispositif anti-dévers, destiné à équiper un train de véhicule automobile ayant des roues droite et gauche, et comprenant une barre propre à être couplée à ces roues droite et gauche via deux biellettes.It proposes in particular for this purpose an anti-roll device, intended to equip a motor vehicle train having right and left wheels, and comprising a bar capable of being coupled to these right and left wheels via two rods.

Ce dispositif anti-dévers se caractérise par le fait qu'il comprend

  • des moyens d'action faisant partie de la barre et comportant un carter définissant une chambre subdivisée en des première et seconde parties de volumes variables par un piston solidaire fixement d'une tige, et comprenant des première et seconde entrées-sorties communiquant respectivement avec les première et seconde parties et une entrée-sortie intermédiaire communiquant avec la première partie ou la seconde partie selon la position du piston, et prenant un état débrayé ou un état bloqué dans n'importe quelle position du piston selon des états d'accessibilité en cours respectifs des première et seconde entrées-sorties et de l'entrée-sortie intermédiaire, et
  • un circuit de contrôle hydraulique et contrôlant les états d'accessibilité en fonction de commandes reçues,
et en ce que la barre comprend un premier bras dont une première extrémité est solidarisée fixement au carter, un second bras dont une première extrémité est solidarisée à la tige du piston, la tige pouvant translater par rapport au carter, les secondes extrémités des premier et second bras étant reliées chacune à une biellette.This anti-roll device is characterized by the fact that it comprises
  • means of action forming part of the bar and comprising a casing defining a chamber subdivided into first and second parts of variable volumes by a piston fixedly fixed to a rod, and comprising first and second inlets-outlets communicating respectively with the first and second parts and an intermediate input-output communicating with the first part or the second part according to the position of the piston, and taking a disengaged state or a locked state in any position of the piston according to current accessibility states respectively of the first and second input-outputs and of the intermediate input-output, and
  • a hydraulic control circuit and controlling the states of accessibility according to commands received,
and in that the bar comprises a first arm, a first end of which is fixedly secured to the casing, a second arm, a first end of which is secured to the piston rod, the rod being able to translate relative to the casing, the second ends of the first and second arm each being connected to a connecting rod.

Grâce à l'invention, on peut désormais placer les moyens d'action dans leur état bloqué quelle que soit la position en cours du piston. La biellette ou la barre comprenant les moyens d'action reviendra toujours en position neutre sous l'effet des mouvements de roues ou de caisse et restera en position neutre par la suite. Cela permet d'obtenir le comportement bloqué sans attendre que la biellette ou la barre se positionne au milieu. Cela évite aussi de mettre en place un algorithme de contrôle pour bloquer la biellette ou la barre en position neutre, avec les capteurs associés et les risques liés.Thanks to the invention, it is now possible to place the means of action in their locked state regardless of the current position of the piston. The connecting rod or the bar comprising the means of action will always return to neutral position under the effect of wheel or body movements and will remain in neutral position thereafter. This makes it possible to obtain the blocked behavior without waiting for the link or the bar to position itself in the middle. This also avoids setting up a control algorithm to block the link or the bar in neutral position, with the associated sensors and the related risks.

Le dispositif anti-dévers selon l'invention peut comporter d'autres caractéristiques qui peuvent être prises séparément ou en combinaison, et notamment :

  • le circuit de contrôle peut comprendre, d'une première part, des premier et second moyens anti-retour couplés chacun à au moins l'une des première et seconde entrées-sorties et entrée-sortie intermédiaire, d'une deuxième part, au moins une électrovanne couplée à au moins l'une des première et seconde entrées-sorties et entrée-sortie intermédiaire, et éventuellement à l'un au moins des premier et second moyens anti-retour, et placée soit dans un premier état imposant l'état débrayé, soit dans un second état imposant l'état bloqué, et, d'une troisième part, un réservoir de fluide compensant au moins des variations de volume induites par des déplacements du piston ;
    • ➢ dans un premier mode de réalisation, le circuit de contrôle peut coupler, d'une première part, la première entrée-sortie au réservoir de fluide via le premier moyen anti-retour, permettant uniquement un passage de fluide du réservoir de fluide vers la première entrée-sortie, et via une première électrovanne montée en parallèle du premier moyen anti-retour et pouvant prendre soit un premier état ouvert associé à l'état débrayé, soit un second état fermé associé à l'état bloqué, d'une deuxième part, la seconde entrée-sortie au réservoir de fluide via le second moyen anti-retour, permettant uniquement un passage de fluide du réservoir de fluide vers la seconde entrée-sortie, et via une seconde électrovanne montée en parallèle du second moyen anti-retour et pouvant prendre soit un premier état ouvert associé à l'état débrayé, soit un second état fermé associé à l'état bloqué, et, d'une troisième part, l'entrée-sortie intermédiaire au réservoir de fluide. Dans ce cas, le circuit de contrôle place les première et seconde électrovannes soit dans le premier état ouvert pour placer les moyens d'action dans l'état débrayé, soit dans le second état fermé pour placer les moyens d'action dans l'état bloqué ;
    • ➢ dans un deuxième mode de réalisation, le circuit de contrôle peut coupler, d'une première part, la première entrée-sortie au réservoir de fluide via une première électrovanne comportant le premier moyen anti-retour, permettant uniquement un passage de fluide du réservoir de fluide vers la première entrée-sortie, et pouvant prendre soit un premier état ouvert associé à l'état débrayé, soit un second état défini par le premier moyen anti-retour et associé à l'état bloqué, d'une deuxième part, la seconde entrée-sortie au réservoir de fluide via une seconde électrovanne comportant le second moyen anti-retour, permettant uniquement un passage de fluide du réservoir de fluide vers la seconde entrée-sortie, et pouvant prendre soit un premier état ouvert associé à l'état débrayé, soit un second état défini par le second moyen anti-retour et associé à l'état bloqué, et, d'une troisième part, l'entrée-sortie intermédiaire au réservoir de fluide. Dans ce cas, le circuit de contrôle place les première et seconde électrovannes soit dans le premier état ouvert pour placer les moyens d'action dans l'état débrayé, soit dans le second état pour placer les moyens d'action dans l'état bloqué ;
    • ➢ dans un troisième mode de réalisation, le circuit de contrôle peut coupler, d'une part, les première et seconde entrées-sorties au réservoir de fluide via une électrovanne à au moins trois voies et comportant les premier et second moyens anti-retour, permettant uniquement un passage de fluide du réservoir de fluide vers respectivement les première et seconde entrées-sorties, et pouvant prendre soit un premier état ouvert associé à l'état débrayé, soit un second état défini par les premier et second moyens anti-retour et associé à l'état bloqué, et, d'autre part, l'entrée-sortie intermédiaire au réservoir de fluide. Dans ce cas, le circuit de contrôle place les première et seconde électrovannes soit dans le premier état ouvert pour placer les moyens d'action dans l'état débrayé, soit dans le second état pour placer les moyens d'action dans l'état bloqué ;
    • ➢ dans un quatrième mode de réalisation, le circuit de contrôle peut coupler les première et seconde entrées-sorties et l'entrée-sortie intermédiaire au réservoir de fluide via une électrovanne à six voies et, d'une part, comportant les premier et second moyens anti-retour, permettant uniquement un passage de fluide du réservoir de fluide vers respectivement les première et seconde entrées-sorties, et, d'autre part, pouvant prendre soit un premier état ouvert associé à l'état débrayé et dans lequel le fluide circule entre les première et seconde parties et le réservoir de fluide mais ne circule pas entre l'entrée-sortie intermédiaire et le réservoir de fluide, soit un second état associé à l'état bloqué et dans lequel le fluide circule du réservoir de fluide vers les première et seconde parties via respectivement les premier et second moyens anti-retour et circule entre l'entrée-sortie intermédiaire et le réservoir de fluide. Dans ce cas, le circuit de contrôle place l'électrovanne soit dans le premier état ouvert pour placer les moyens d'action dans l'état débrayé, soit dans le second état pour placer les moyens d'action dans l'état bloqué ;
  • le piston peut comprendre un bord périphérique ayant une épaisseur strictement supérieure à une dimension correspondante de l'entrée-sortie intermédiaire. Par exemple, le bord périphérique du piston peut loger partiellement un joint d'étanchéité ayant une épaisseur strictement supérieure à la dimension correspondante de l'entrée-sortie intermédiaire ;
    ➢ le carter et le piston peuvent définir un vérin à palette ou un vérin à vis.
The anti-roll device according to the invention may comprise other characteristics which may be taken separately or in combination, and in particular:
  • the control circuit may comprise, firstly, first and second non-return means each coupled to at least one of the first and second input-outputs and intermediate input-output, secondly, at least a solenoid valve coupled to at least one of the first and second input-outputs and intermediate input-output, and optionally to at least one of the first and second non-return means, and placed either in a first state imposing the state disengaged, or in a second state imposing the blocked state, and, on the third hand, a fluid reservoir compensating at least for volume variations induced by movements of the piston;
    • ➢ in a first embodiment, the control circuit can couple, on the one hand, the first inlet-outlet to the fluid reservoir via the first non-return means, allowing only a passage of fluid from the fluid reservoir to the first input-output, and via a first solenoid valve mounted in parallel with the first non-return means and able to assume either a first open state associated with the disengaged state, or a second closed state associated with the blocked state, of a second part, the second inlet-outlet to the fluid reservoir via the second non-return means, allowing only a passage of fluid from the fluid reservoir to the second inlet-outlet, and via a second solenoid valve mounted in parallel with the second non-return means and being able to assume either a first open state associated with the disengaged state, or a second closed state associated with the blocked state, and, on the third hand, the intermediate input-output to the fluid reservoir. In this case, the control circuit places the first and second solenoid valves either in the first open state to place the means of action in the disengaged state, or in the second closed state to place the means of action in the blocked state;
    • ➢ in a second embodiment, the control circuit can couple, on the one hand, the first inlet-outlet to the fluid reservoir via a first solenoid valve comprising the first non-return means, allowing only fluid passage from the reservoir fluid to the first input-output, and being able to assume either a first open state associated with the disengaged state, or a second state defined by the first non-return means and associated with the blocked state, on the second hand, the second inlet-outlet to the fluid reservoir via a second solenoid valve comprising the second non-return means, allowing only a passage of fluid from the fluid reservoir to the second inlet-outlet, and being able to assume either a first open state associated with the disengaged state, or a second state defined by the second non-return means and associated with the blocked state, and, on the third hand, the intermediate inlet-outlet to the fluid reservoir. In this case, the control circuit places the first and second solenoid valves either in the first open state to place the means of action in the disengaged state, or in the second state to place the means of action in the blocked state ;
    • ➢ in a third embodiment, the control circuit can couple, on the one hand, the first and second inputs-outputs to the fluid reservoir via a solenoid valve with at least three channels and comprising the first and second non-return means, allowing only a passage of fluid from the fluid reservoir to respectively the first and second inlets-outlets, and being able to assume either a first open state associated with the disengaged state, or a second state defined by the first and second non-return means and associated with the blocked state, and, on the other hand, the intermediate inlet-outlet to the fluid reservoir. In this case, the control circuit places the first and second solenoid valves either in the first open state to place the means of action in the disengaged state, or in the second state to place the means of action in the blocked state ;
    • ➢ in a fourth embodiment, the control circuit can couple the first and second input-outputs and the intermediate input-output to the fluid reservoir via a six-way solenoid valve and, on the one hand, comprising the first and second non-return means, allowing only a passage of fluid from the fluid reservoir to respectively the first and second inlets-outlets, and, on the other hand, being able to assume either a first open state associated with the disengaged state and in which the fluid circulates between the first and second parts and the fluid reservoir but does not circulate between the intermediate inlet-outlet and the fluid reservoir, i.e. a second state associated with the blocked state and in which the fluid circulates from the fluid reservoir to the first and second parts respectively via the first and second non-return means and circulates between the intermediate inlet-outlet and the fluid reservoir. In this case, the control circuit places the solenoid valve either in the first open state to place the means of action in the disengaged state, or in the second state to place the means of action in the blocked state;
  • the piston may include a peripheral edge having a thickness strictly greater than a corresponding dimension of the intermediate inlet-outlet. For example, the peripheral edge of the piston can partially house a seal having a thickness strictly greater than the corresponding dimension of the intermediate inlet-outlet;
    ➢ the casing and the piston can define a vane jack or a screw jack.

Dans le cas d'un vérin à vis celui-ci est de préférence à vis à billes ;

  • il peut comprendre des moyens de contrôle propres à générer chaque commande à destination de chaque électrovanne.
In the case of a screw jack, it is preferably a ball screw;
  • it may include control means capable of generating each command intended for each solenoid valve.

L'invention propose également un véhicule automobile comprenant au moins un train comportant des roues droite et gauche couplées via un dispositif anti-dévers du type de celui présenté ci-avant.The invention also proposes a motor vehicle comprising at least one train comprising right and left wheels coupled via an anti-roll device of the type presented above.

D'autres caractéristiques et avantages de l'invention apparaîtront à l'examen de la description détaillée ci-après, et des dessins annexés, sur lesquels :

  • la figure 1 illustre schématiquement et fonctionnellement, dans une vue en perspective, un premier exemple de réalisation d'un dispositif anti-dévers selon l'invention, avant son couplage à un train d'un véhicule automobile,
  • la figure 2 illustre schématiquement et fonctionnellement, dans une vue en perspective, un second exemple de réalisation d'un dispositif anti-dévers selon l'invention, avant son couplage à un train d'un véhicule automobile,
  • la figure 3 illustre schématiquement et fonctionnellement, dans une vue en coupe, un premier exemple de réalisation de moyens d'action et de circuit de contrôle d'un dispositif anti-dévers selon l'invention,
  • la figure 4 illustre schématiquement et fonctionnellement, dans une vue en coupe, un deuxième exemple de réalisation de moyens d'action et de circuit de contrôle d'un dispositif anti-dévers selon l'invention,
  • la figure 5 illustre schématiquement et fonctionnellement, dans une vue en coupe, un troisième exemple de réalisation de moyens d'action et de circuit de contrôle d'un dispositif anti-dévers selon l'invention,
  • la figure 6 illustre schématiquement et fonctionnellement, dans une vue en coupe, un quatrième exemple de réalisation de moyens d'action et de circuit de contrôle d'un dispositif anti-dévers selon l'invention, et
  • la figure 7 illustre schématiquement et fonctionnellement, dans une vue en coupe, un cinquième exemple de réalisation de moyens d'action et de circuit de contrôle d'un dispositif anti-dévers selon l'invention.
Other characteristics and advantages of the invention will appear on examination of the detailed description below, and of the appended drawings, in which:
  • the figure 1 illustrates schematically and functionally, in a side view perspective, a first embodiment of an anti-roll device according to the invention, before its coupling to an undercarriage of a motor vehicle,
  • the figure 2 schematically and functionally illustrates, in a perspective view, a second embodiment of an anti-roll device according to the invention, before its coupling to an undercarriage of a motor vehicle,
  • the picture 3 schematically and functionally illustrates, in a cross-sectional view, a first embodiment of means of action and control circuit of an anti-roll device according to the invention,
  • the figure 4 illustrates schematically and functionally, in a cross-sectional view, a second embodiment of means of action and control circuit of an anti-roll device according to the invention,
  • the figure 5 schematically and functionally illustrates, in a cross-sectional view, a third embodiment of means of action and control circuit of an anti-roll device according to the invention,
  • the figure 6 schematically and functionally illustrates, in a cross-sectional view, a fourth embodiment of means of action and control circuit of an anti-roll device according to the invention, and
  • the figure 7 illustrates schematically and functionally, in a cross-sectional view, a fifth embodiment of means of action and control circuit of an anti-roll device according to the invention.

L'invention a notamment pour but de proposer un dispositif anti-dévers (ou anti-roulis ou encore de stabilisation) DA destiné à équiper un train d'un véhicule automobile.The object of the invention is in particular to propose an anti-roll (or anti-roll or even stabilization) device DA intended to equip a train of a motor vehicle.

Dans ce qui suit, on considère, à titre d'exemple non limitatif, que le véhicule automobile est une voiture. Mais l'invention n'est pas limitée à ce type de véhicule automobile. Elle concerne en effet tout type de véhicule automobile comprenant au moins un train de roues devant être équipé d'un dispositif anti-dévers.In what follows, it is considered, by way of non-limiting example, that the motor vehicle is a car. But the invention is not limited to this type of motor vehicle. It relates in fact to any type of motor vehicle comprising at least one set of wheels to be equipped with an anti-roll device.

Par ailleurs, on considère dans ce qui suit, à titre d'exemple non limitatif, que le train est destiné à être installé dans une partie avant d'un véhicule automobile. Mais l'invention concerne également les trains arrière de véhicule automobile.Furthermore, it is considered in what follows, by way of non-limiting example, that the train is intended to be installed in a front part of a motor vehicle. But the invention also relates to the rear axles of motor vehicles.

Sur les figures 1 et 2 sont illustrés schématiquement deux exemples de réalisation d'un dispositif anti-dévers DA selon l'invention, destiné à équiper un train de roues d'un véhicule automobile (ici une voiture). Comme illustré, un dispositif anti-dévers DA, selon l'invention, comprend au moins une barre anti-dévers BA, des première B1 et seconde B2 biellettes, des moyens d'action MAC et un circuit de contrôle CC hydraulique.On the figures 1 and 2 two examples are schematically illustrated production of an anti-roll device DA according to the invention, intended to equip a wheel set of a motor vehicle (here a car). As illustrated, an anti-roll device DA, according to the invention, comprises at least one anti-roll bar BA, first B1 and second B2 connecting rods, means of action MAC and a hydraulic control circuit CC.

La barre (anti-dévers) BA est propre à être couplée à des roues droite et gauche d'un train d'un véhicule automobile, via les première B1 et seconde B2 biellettes. Elle est par ailleurs couplée à la caisse du véhicule, par exemple via des paliers PB, comme illustré non limitativement sur la figure 1.The bar (anti-roll) BA is adapted to be coupled to the right and left wheels of an undercarriage of a motor vehicle, via the first B1 and second B2 connecting rods. It is also coupled to the body of the vehicle, for example via bearings PB, as illustrated without limitation in the figure 1 .

On notera que dans les deux exemples illustrés non limitativement sur les figures 1 et 2, la barre (anti-dévers) BA présente une forme générale en U. Mais elle pourrait présenter d'autres formes.It will be noted that in the two examples illustrated without limitation on the figures 1 and 2 , the (anti-roll) bar BA has a general U-shape. But it could have other shapes.

Dans le premier exemple illustré non limitativement sur la figure 1, la barre (anti-dévers) BA est monobloc. Elle comprend donc deux extrémités E1j (j = 1 ou 2) opposées et propres à être couplées respectivement aux roues droite et gauche d'un train via les première B1 et seconde B2 biellettes. Le couplage biellette Bj / extrémité E1j peut se faire par une liaison rotule ou pivot, par exemple.In the first example illustrated without limitation on the figure 1 , the (anti-roll) bar BA is one-piece. It therefore comprises two opposite ends E1j (j=1 or 2) capable of being coupled respectively to the right and left wheels of a train via the first B1 and second B2 connecting rods. The connecting rod Bj / end E1j coupling can be made by a ball joint or pivot connection, for example.

Dans le second exemple illustré non limitativement sur la figure 2, la barre (anti-dévers) BA comprend des premier BR1 et second BR2 bras qui sont indépendants l'un de l'autre, et comprennent chacun des première E1j et seconde E2j extrémités. Chaque première extrémité E1j est propre à être couplée à l'une des roues droite et gauche d'un train via l'une des biellettes Bj. Le couplage biellette Bj / première extrémité E1j peut se faire par une liaison rotule ou pivot, par exemple. Les secondes extrémités E2j sont couplées aux moyens d'action MAC.In the second example illustrated without limitation on the figure 2 , the bar (anti-roll) BA comprises first BR1 and second BR2 arms which are independent of one another, and each comprise first E1j and second E2j ends. Each first end E1j is capable of being coupled to one of the right and left wheels of a train via one of the rods Bj. The link rod Bj / first end E1j coupling can be made by a ball joint or pivot connection, for example . The second ends E2j are coupled to the means of action MAC.

Dans les deux exemples illustrés non limitativement sur les figures 1 et 2, la valeur 1 de l'indice j désigne le côté droit, tandis que la valeur 2 de l'indice j désigne le côté gauche. Mais l'inverse est possible.In the two examples illustrated without limitation on the figures 1 and 2 , the value 1 of the index j designates the right side, while the value 2 of the index j designates the left side. But the reverse is possible.

Les moyens d'action MAC font partie soit de l'une des biellettes Bj, comme illustré sur la figure 1, soit de la barre BA, comme illustré sur la figure 2. Dans tous les cas, ces moyens d'action MAC comportent un carter CR et un piston PI.The MAC means of action are part either of one of the rods Bj, as illustrated in the figure 1 , or bar BA, as shown in figure figure 2 . In all cases, these means of action MAC comprise a housing CR and a piston PI.

Le carter CR définit une chambre CH qui est subdivisée en des première P1 et seconde P2 parties de volumes variables par un piston PI solidaire fixement d'une tige T. De plus, le carter CR comprend une première entrée-sortie ES1 qui communique avec la première partie P1 de la chambre CH, une seconde entrée-sortie ES2 qui communique avec la seconde partie P2 de la chambre CH, et une entrée-sortie intermédiaire ESI qui communique avec la première partie P1 ou la seconde partie P2 de la chambre CH selon la position du piston PI.The housing CR defines a chamber CH which is subdivided into first P1 and second P2 parts of variable volumes by a piston PI fixedly fixed to a rod T. In addition, the housing CR comprises a first input-output ES1 which communicates with the first part P1 of the chamber CH, a second input-output ES2 which communicates with the second part P2 of the chamber CH, and an intermediate input-output ESI which communicates with the first part P1 or the second part P2 of the chamber CH according to the position of the PI piston.

Le carter CR et le piston PI (avec sa tige T) définissent une sorte de vérin à trois entrées-sorties ES1, ES2 et ESI.The housing CR and the piston PI (with its rod T) define a sort of jack with three inputs-outputs ES1, ES2 and ESI.

Le piston PI comprend un bord périphérique BP ayant une épaisseur e strictement supérieure à une dimension correspondante de l'entrée-sortie intermédiaire ESI, afin que du fluide ne puisse pas entrer ou sortir par l'entrée-sortie intermédiaire ESI de la chambre CH lorsque le piston PI est placé devant cette entrée-sortie intermédiaire ESI.The piston PI comprises a peripheral edge BP having a thickness e strictly greater than a corresponding dimension of the intermediate inlet-outlet ESI, so that fluid cannot enter or leave through the intermediate inlet-outlet ESI of the chamber CH when the piston PI is placed in front of this intermediate input-output ESI.

Il est préférable que le bord périphérique BP du piston PI loge partiellement un joint d'étanchéité JE ayant une épaisseur strictement supérieure à la dimension correspondante de l'entrée-sortie intermédiaire ESI. Cela permet que le joint JE obstrue complètement l'entrée-sortie intermédiaire ESI lorsque le piston PI est placé devant cette entrée-sortie intermédiaire ESI (et donc à mi-course).It is preferable that the peripheral edge BP of the piston PI partially houses a seal JE having a thickness strictly greater than the corresponding dimension of the intermediate inlet-outlet ESI. This allows the joint JE to completely obstruct the intermediate inlet-outlet ESI when the piston PI is placed in front of this intermediate inlet-outlet ESI (and therefore halfway through).

Dans le premier exemple illustré non limitativement sur la figure 1, le carter CR est solidarisé fixement à une partie inférieure de la première biellette B1, et l'extrémité de la tige T qui est opposée au piston PI est solidarisée fixement à une partie supérieure de la première biellette B1. En revanche, dans le second exemple illustré non limitativement sur la figure 2, le carter CR est solidarisé fixement à la seconde extrémité E21 du premier bras BR1, et l'extrémité de la tige T qui est opposée au piston PI est solidarisée fixement à la seconde extrémité E22 du second bras BR2. Un agencement inversé est également possible.In the first example illustrated without limitation on the figure 1 , the housing CR is fixedly fixed to a lower part of the first link B1, and the end of the rod T which is opposite the piston PI is fixedly fixed to an upper part of the first link B1. On the other hand, in the second example illustrated without limitation on the figure 2 , the housing CR is fixedly secured to the second end E21 of the first arm BR1, and the end of the rod T which is opposite to the piston PI is fixedly secured to the second end E22 of the second arm BR2. An inverted arrangement is also possible.

On notera que le carter CR peut, par exemple, présenter une forme cylindrique circulaire.It will be noted that the housing CR may, for example, have a circular cylindrical shape.

On notera également que dans le premier exemple illustré non limitativement sur la figure 1, le carter CR et le piston PI peuvent définir un vérin classique du fait qu'ils permettent une variation, par translation du piston PI avec sa tige T, de la longueur (ou hauteur) de la (première) biellette B1 lorsque cette dernière (B1) réagit aux sollicitations du train. En d'autres termes, l'une des biellettes Bj (ici B1) constitue une biellette de longueur variable et pilotée par une commande, et l'autre biellette Bj' (ici B2) présente une longueur fixe et donc est tout à fait classique.It will also be noted that in the first example illustrated not limited to the figure 1 , the housing CR and the piston PI can define a conventional actuator because they allow a variation, by translation of the piston PI with its rod T, of the length (or height) of the (first) connecting rod B1 when the latter ( B1) reacts to the demands of the train. In other words, one of the rods Bj (here B1) constitutes a rod of variable length and controlled by a command, and the other rod Bj' (here B2) has a fixed length and is therefore entirely conventional. .

Dans le second exemple illustré non limitativement sur la figure 2, le carter CR et le piston PI peuvent définir un vérin à palette ou un vérin à vis, en particulier à vis à billes, par exemple, du fait qu'ils permettent une variation, par une combinaison d'une rotation et d'une translation du piston PI avec sa tige T, de la rotation relative du premier bras BR1 par rapport au second bras BR2. En d'autres termes, l'une des deux parties Pj (par exemple P1) constitue une « chambre stator » tandis que l'autre partie (par exemple P2) constitue une «chambre rotor». Les deux biellettes Bj présentent donc, ici, une longueur fixe. Elles (Bj) sont donc classiques du fait qu'elles sont dépourvues des moyens d'action MAC.In the second example illustrated without limitation on the figure 2 , the housing CR and the piston PI can define a vane jack or a screw jack, in particular a ball screw jack, for example, because they allow a variation, by a combination of a rotation and a translation of the piston PI with its rod T, of the relative rotation of the first arm BR1 with respect to the second arm BR2. In other words, one of the two parts Pj (for example P1) constitutes a “stator chamber” while the other part (for example P2) constitutes a “rotor chamber”. The two connecting rods Bj therefore have, here, a fixed length. They (Bj) are therefore conventional in that they lack the means of action MAC.

Ces moyens d'action MAC peuvent prendre soit un état débrayé, soit un état bloqué dans n'importe quelle position du piston PI, selon des états d'accessibilité en cours respectifs des première ES1 et seconde ES2 entrées-sorties et de l'entrée-sortie intermédiaire ESI.These means of action MAC can assume either a disengaged state or a locked state in any position of the piston PI, depending on respective current accessibility states of the first input-output ES1 and second ES2 and of the input -ESI intermediate output.

On entend ici par « état d'accessibilité » la possibilité ou l'impossibilité qu'à un fluide d'entrer par une entrée-sortie pour pénétrer dans une partie de la chambre du carter ou de sortir par une entrée-sortie pour circuler dans le circuit de contrôle CC.Here, the term “accessibility state” means the possibility or impossibility for a fluid to enter through an inlet-outlet to enter a part of the crankcase chamber or to leave by an inlet-outlet to circulate in the DC control circuit.

Le circuit de contrôle CC est hydraulique (et donc est parcouru par un fluide) et contrôle les états d'accessibilité des entrées-sorties ES1, ES2 et ESI en fonction de commandes reçues.The control circuit CC is hydraulic (and therefore is traversed by a fluid) and controls the states of accessibility of the inputs-outputs ES1, ES2 and ESI according to commands received.

Le fluide peut, par exemple, être une huile. Ainsi, il pourra par exemple s'agir d'une huile hydraulique ou d'une huile d'amortisseur.The fluid can, for example, be an oil. Thus, it may for example be a hydraulic oil or a shock absorber oil.

Chaque commande reçue peut, par exemple, être déterminée en fonction d'irrégularités détectées sous le véhicule par un capteur de paramètre physique (tel qu'un accéléromètre) et/ou d'une fin de virage détectée devant le véhicule par des moyens d'observation ou par un système de guidage par satellites et/ou de la vitesse en cours du véhicule. Par ailleurs, chaque commande reçue provient de moyens de contrôle MCT qui peuvent éventuellement faire partie du dispositif anti-dévers DA. Par exemple, ils peuvent faire partie d'un calculateur du véhicule et être chargés de déterminer en temps réel et de façon dynamique, chaque commande.Each command received can, for example, be determined according to irregularities detected under the vehicle by a physical parameter sensor (such as an accelerometer) and/or an end of turn detected in front of the vehicle by observation means or by a satellite guidance system and/or the current speed of the vehicle. Furthermore, each command received comes from control means MCT which may possibly form part of the anti-roll device DA. For example, they can be part of a vehicle computer and be responsible for determining in real time and dynamically, each command.

Par exemple, le circuit de contrôle CC peut comprendre des premier MA1 et second MA2 moyens anti-retour, au moins une électrovanne EVk et un réservoir de fluide RF, comme illustré non limitativement sur les figures 3 à 7.For example, the control circuit CC may comprise first non-return means MA1 and second MA2, at least one solenoid valve EVk and a fluid reservoir RF, as illustrated without limitation in the figures 3 to 7 .

Les premier MA1 et second MA2 moyens anti-retour sont couplés chacun à au moins l'une des première ES1 et seconde ES2 entrées-sorties et entrée-sortie intermédiaire ESI.The first MA1 and second MA2 non-return means are each coupled to at least one of the first ES1 and second ES2 input-output and intermediate input-output ESI.

Par exemple, ces premier MA1 et second MA2 moyens anti-retour peuvent être agencés sous la forme de clapets anti-retour. Mais cela n'est pas obligatoire. En effet, ce qui est important c'est qu'ils permettent chacun une circulation de fluide selon un unique sens (ici vers l'une au moins des entrées-sorties ES1 et ES2), mais pas selon le sens inverse (à savoir ici depuis l'une au moins des entrées-sorties ES1 et ES2).For example, these first MA1 and second non-return means MA2 can be arranged in the form of non-return valves. But this is not mandatory. Indeed, what is important is that they each allow fluid circulation in a single direction (here towards at least one of the inputs-outputs ES1 and ES2), but not in the opposite direction (namely here from at least one of the ES1 and ES2 input-outputs).

La/chaque électrovanne EVk est couplée à au moins l'une des première ES1 et seconde ES2 entrées-sorties et entrée-sortie intermédiaire ESI, et éventuellement à l'un au moins des premier MA1 et second MA2 moyens anti-retour, et peut être placée soit dans un premier état imposant l'état débrayé des moyens d'action MAC, soit dans un second état imposant l'état bloqué des moyens d'action MAC.The/each solenoid valve EVk is coupled to at least one of the first ES1 and second ES2 input-outputs and intermediate input-output ESI, and optionally to at least one of the first MA1 and second MA2 non-return means, and can be placed either in a first state imposing the disengaged state of the MAC action means, or in a second state imposing the blocked state of the MAC action means.

Dans l'état débrayé les première P1 et seconde P2 parties de la chambre CH peuvent être reliées entre elles et au réservoir de fluide RF par le circuit de contrôle CC, et par conséquent la longueur (ou hauteur) de la première biellette B1 peut varier librement.In the disengaged state, the first P1 and second P2 parts of the chamber CH can be connected to each other and to the fluid reservoir RF by the control circuit CC, and consequently the length (or height) of the first connecting rod B1 can vary freely.

Dans l'état bloqué la/chaque électrovanne EVk n'autorise une évacuation de fluide hors de la chambre CH que par l'entrée-sortie intermédiaire ESI, et par conséquent la longueur (ou hauteur) de la première biellette B1 ne peut pas varier librement. C'est un fonctionnement similaire à celui d'un cliquet hydraulique et qui permet d'avoir une position à l'équilibre à mi-course lorsque le piston PI est au niveau de l'entrée-sortie intermédiaire ESI.In the blocked state, the/each solenoid valve EVk only authorizes evacuation of fluid from the chamber CH via the intermediate inlet-outlet ESI, and consequently the length (or height) of the first rod B1 cannot vary freely. It works similar to that of a hydraulic pawl and which makes it possible to have a position in equilibrium at mid-stroke when the piston PI is at the level of the intermediate input-output ESI.

L'état (premier ou second) dans lequel est placée une électrovanne EVk est piloté (ou défini) par la commande que reçoit cette électrovanne EVk.The state (first or second) in which a solenoid valve EVk is placed is driven (or defined) by the command received by this solenoid valve EVk.

Le réservoir de fluide RF est chargé de compenser au moins des variations de volume induites par des déplacements du piston PI, ainsi qu'éventuellement des variations liées à la température.The fluid reservoir RF is responsible for compensating at least variations in volume induced by displacements of the piston PI, as well as possibly variations linked to the temperature.

L'exemple de circuit de contrôle CC décrit ci-avant peut être agencé de différentes façons. Cinq de ces façons sont décrites ci-après en référence respectivement aux figures 3 à 7.The example of control circuit CC described above can be arranged in different ways. Five of these ways are described below with reference respectively to the figures 3 to 7 .

Dans la première façon, illustrée sur la figure 3, le circuit de contrôle CC comprend des première EV1 (k = 1) et seconde EV2 (k = 2) électrovannes à deux voies, les premier MA1 et second MA2 moyens anti-retour, le réservoir de fluide RF et des conduits dans lesquels peut circuler le fluide.In the first way, illustrated on the picture 3 , the control circuit CC comprises first EV1 (k = 1) and second EV2 (k = 2) two-way solenoid valves, the first MA1 and second MA2 non-return means, the RF fluid reservoir and conduits in which can circulate the fluid.

Ce circuit de contrôle CC couple :

  • la première entrée-sortie ES1 au réservoir de fluide RF via le premier moyen anti-retour MA1, qui permet uniquement un passage de fluide du réservoir de fluide RF vers la première entrée-sortie ES1, et via la première électrovanne EV1, qui est montée en parallèle du premier moyen anti-retour MA1 et peut prendre soit un premier état ouvert associé à l'état débrayé, soit un second état fermé associé à l'état bloqué,
  • la seconde entrée-sortie ES2 au réservoir de fluide RF via le second moyen anti-retour MA2, qui permet uniquement un passage de fluide du réservoir de fluide RF vers la seconde entrée-sortie ES2, et via la seconde électrovanne EV2, qui est montée en parallèle du second moyen anti-retour MA2 et peut prendre soit un premier état ouvert associé à l'état débrayé, soit un second état fermé associé à l'état bloqué, et
  • l'entrée-sortie intermédiaire ESI au réservoir de fluide RF.
This DC control circuit couples:
  • the first inlet-outlet ES1 to the fluid reservoir RF via the first non-return means MA1, which only allows a passage of fluid from the fluid reservoir RF to the first inlet-outlet ES1, and via the first solenoid valve EV1, which is mounted in parallel with the first non-return means MA1 and can assume either a first open state associated with the disengaged state, or a second closed state associated with the blocked state,
  • the second inlet-outlet ES2 to the fluid reservoir RF via the second non-return means MA2, which only allows a passage of fluid from the fluid reservoir RF to the second inlet-outlet ES2, and via the second solenoid valve EV2, which is mounted in parallel with the second non-return means MA2 and can assume either a first open state associated with the disengaged state, or a second closed state associated with the blocked state, and
  • the intermediate inlet-outlet ESI to the fluid reservoir RF.

De plus, le circuit de contrôle CC place les première EV1 et seconde EV2 électrovannes soit dans le premier état ouvert lorsque les moyens d'action MAC doivent être placés dans l'état débrayé, soit dans le second état fermé lorsque les moyens d'action MAC doivent être placés dans l'état bloqué. Par conséquent, dans l'état débrayé, le fluide circule entre les première P1 et seconde P2 parties de la chambre CH, ainsi qu'entre les première P1 et seconde P2 parties et le réservoir de fluide RF. Dans l'état bloqué, le fluide est interdit de circuler non seulement entre les première P1 et seconde P2 parties de la chambre CH, mais également entre les première P1 et seconde P2 parties et le réservoir de fluide RF.In addition, the control circuit CC places the first EV1 and second EV2 solenoid valves either in the first open state when the action means MAC must be placed in the disengaged state, or in the second closed state when the action means MAC must be placed in the state blocked. Consequently, in the disengaged state, the fluid circulates between the first P1 and second P2 parts of the chamber CH, as well as between the first P1 and second P2 parts and the fluid reservoir RF. In the blocked state, the fluid is prohibited from circulating not only between the first P1 and second P2 parts of the chamber CH, but also between the first P1 and second P2 parts and the fluid reservoir RF.

Dans la deuxième façon, illustrée sur la figure 4, le circuit de contrôle CC comprend des première EV1 (k = 1) et seconde EV2 (k = 2) électrovannes à deux voies et comprenant respectivement les premier MA1 et second MA2 moyens anti-retour, le réservoir de fluide RF et des conduits dans lesquels peut circuler le fluide.In the second way, illustrated on the figure 4 , the control circuit CC comprises first EV1 (k = 1) and second EV2 (k = 2) two-way solenoid valves and respectively comprising the first MA1 and second MA2 non-return means, the RF fluid reservoir and conduits in which can circulate the fluid.

Ce circuit de contrôle CC couple :

  • la première entrée-sortie ES1 au réservoir de fluide RF via la première électrovanne EV1, qui comprend le premier moyen anti-retour MA1 qui permet uniquement un passage de fluide du réservoir de fluide RF vers la première entrée-sortie ES1, et qui peut prendre soit un premier état ouvert associé à l'état débrayé, soit un second état défini par le premier moyen anti-retour MA1 et associé à l'état bloqué,
  • la seconde entrée-sortie ES2 au réservoir de fluide RF via la seconde électrovanne EV2, qui comprend le second moyen anti-retour MA2 qui permet uniquement un passage de fluide du réservoir de fluide RF vers la seconde entrée-sortie ES2, et qui peut prendre soit un premier état ouvert associé à l'état débrayé, soit un second état défini par le second moyen anti-retour MA2 et associé à l'état bloqué, et
  • l'entrée-sortie intermédiaire ESI au réservoir de fluide RF.
This DC control circuit couples:
  • the first inlet-outlet ES1 to the fluid reservoir RF via the first solenoid valve EV1, which comprises the first non-return means MA1 which only allows a passage of fluid from the fluid reservoir RF to the first inlet-outlet ES1, and which can take either a first open state associated with the disengaged state, or a second state defined by the first non-return means MA1 and associated with the blocked state,
  • the second inlet-outlet ES2 to the fluid reservoir RF via the second solenoid valve EV2, which comprises the second non-return means MA2 which only allows a passage of fluid from the fluid reservoir RF to the second inlet-outlet ES2, and which can take either a first open state associated with the disengaged state, or a second state defined by the second non-return means MA2 and associated with the blocked state, and
  • the intermediate inlet-outlet ESI to the fluid reservoir RF.

De plus, le circuit de contrôle CC place les première EV1 et seconde EV2 électrovannes soit dans le premier état ouvert lorsque les moyens d'action MAC doivent être placés dans l'état débrayé, soit dans le second état lorsque les moyens d'action MAC doivent être placés dans l'état bloqué. Par conséquent, dans l'état débrayé, le fluide circule entre les première P1 et seconde P2 parties de la chambre CH, ainsi qu'entre les première P1 et seconde P2 parties et le réservoir de fluide RF. Dans l'état bloqué, le fluide est interdit de circuler non seulement entre les première P1 et seconde P2 parties de la chambre CH, mais également entre les première P1 et seconde P2 parties et le réservoir de fluide RF.In addition, the control circuit CC places the first EV1 and second EV2 solenoid valves either in the first open state when the means of action MAC must be placed in the disengaged state, or in the second state when the means of action MAC must be placed in the blocked state. Consequently, in the disengaged state, the fluid circulates between the first P1 and second P2 parts of the chamber CH, as well as between the first P1 and second P2 parts and the fluid reservoir RF. In the blocked state, the fluid is prohibited from circulating not only between the first P1 and second P2 parts of the chamber CH, but also between the first P1 and second P2 parts and the fluid reservoir RF.

Dans la troisième façon, illustrée sur la figure 5, le circuit de contrôle CC comprend une électrovanne EV1 (k = 1) à trois voies et comprenant les premier MA1 et second MA2 moyens anti-retour, le réservoir de fluide RF et des conduits dans lesquels peut circuler le fluide.In the third way, illustrated on the figure 5 , the control circuit CC comprises a three-way solenoid valve EV1 (k=1) comprising the first non-return means MA1 and second MA2, the fluid reservoir RF and conduits in which the fluid can circulate.

Ce circuit de contrôle CC couple :

  • les première ES1 et seconde ES2 entrées-sorties au réservoir de fluide RF via l'électrovanne EV1, qui comprend les premier MA1 et second MA2 moyens anti-retour qui permettent uniquement un passage de fluide du réservoir de fluide RF vers respectivement les première ES1 et seconde ES2 entrées-sorties, et qui peut prendre soit un premier état ouvert associé à l'état débrayé, soit un second état défini par les premier MA1 et second MA2 moyens anti-retour et associé à l'état bloqué, et
  • l'entrée-sortie intermédiaire ESI au réservoir de fluide RF.
This DC control circuit couples:
  • the first ES1 and second ES2 inputs-outputs to the RF fluid reservoir via the solenoid valve EV1, which comprises the first MA1 and second MA2 non-return means which only allow a passage of fluid from the RF fluid reservoir to respectively the first ES1 and second input-output ES2, and which can take either a first open state associated with the disengaged state, or a second state defined by the first MA1 and second MA2 non-return means and associated with the blocked state, and
  • the intermediate inlet-outlet ESI to the fluid reservoir RF.

De plus, le circuit de contrôle CC place l'électrovanne EV1 soit dans le premier état ouvert lorsque les moyens d'action MAC doivent être placés dans l'état débrayé, soit dans le second état lorsque les moyens d'action MAC doivent être placés dans l'état bloqué. Par conséquent, dans l'état débrayé, le fluide circule entre les première P1 et seconde P2 parties de la chambre CH, ainsi qu'entre les première P1 et seconde P2 parties et le réservoir de fluide RF. Dans l'état bloqué, le fluide est interdit de circuler non seulement entre les première P1 et seconde P2 parties de la chambre CH, mais également entre les première P1 et seconde P2 parties et le réservoir de fluide RF.In addition, the control circuit CC places the solenoid valve EV1 either in the first open state when the means of action MAC must be placed in the disengaged state, or in the second state when the means of action MAC must be placed in the blocked state. Consequently, in the disengaged state, the fluid circulates between the first P1 and second P2 parts of the chamber CH, as well as between the first P1 and second P2 parts and the fluid reservoir RF. In the blocked state, the fluid is prohibited from circulating not only between the first P1 and second P2 parts of the chamber CH, but also between the first P1 and second P2 parts and the fluid reservoir RF.

Dans la quatrième façon, illustrée sur la figure 6, le circuit de contrôle CC est une variante de celui illustré sur la figure 5. Il comprend une électrovanne EV1 (k = 1) à quatre voies (au lieu de trois (d'où la formulation « au moins trois voies »)) et comprenant les premier MA1 et second MA2 moyens anti-retour, le réservoir de fluide RF et des conduits dans lesquels peut circuler le fluide. Le fonctionnement de ce circuit de contrôle CC est identique à ce celui décrit ci-avant en référence à la figure 5, car seul l'agencement interne de l'électrovanne EV1 est différent.In the fourth way, illustrated on the figure 6 , the DC control circuit is a variant of that shown in the figure 5 . It comprises a four-way solenoid valve EV1 (k = 1) (instead of three (hence the formulation "at least three ways")) and comprising the first MA1 and second MA2 non-return means, the fluid reservoir RF and ducts in which the fluid can circulate. The operation of this DC control circuit is identical to that described above with reference to the figure 5 , because only the internal arrangement of the solenoid valve EV1 is different.

Dans la cinquième façon, illustrée sur la figure 7, le circuit de contrôle CC comprend une électrovanne EV1 (k = 1) à six voies (ou ports) p1 à p6 et comprenant les premier MA1 et second MA2 moyens anti-retour, le réservoir de fluide RF et des conduits dans lesquels peut circuler le fluide.In the fifth way, illustrated on the figure 7 , the control circuit CC comprises a solenoid valve EV1 (k=1) with six channels (or ports) p1 to p6 and comprising the first non-return means MA1 and second MA2, the fluid reservoir RF and conduits in which the fluid can circulate.

Ce circuit de contrôle CC couple les première ES1 et seconde ES2 entrées-sorties et l'entrée-sortie intermédiaire ESI au réservoir de fluide RF via l'électrovanne EV1 qui comprend les premier MA1 et second MA2 moyens anti-retour, qui permettent uniquement un passage de fluide du réservoir de fluide RF vers respectivement les première ES1 et seconde ES2 entrées-sorties. Le port p1 est couplé à la première entrée-sortie ES1 et donc à la première partie P1 de la chambre CH. Le port p2 est couplé à la seconde entrée-sortie ES2 et donc à la seconde partie P2 de la chambre CH. Le port p3 est couplé à l'entrée-sortie intermédiaire ESI. Les autres ports p4 à p6 sont couplés au réservoir de fluide RF.This control circuit CC couples the first input-output ES1 and second ES2 and the intermediate input-output ESI to the fluid reservoir RF via the solenoid valve EV1 which comprises the first MA1 and second MA2 non-return means, which only allow a passage of fluid from the fluid reservoir RF to respectively the first ES1 and second ES2 inputs-outputs. The port p1 is coupled to the first input-output ES1 and therefore to the first part P1 of the chamber CH. The port p2 is coupled to the second input-output ES2 and therefore to the second part P2 of the chamber CH. Port p3 is coupled to the ESI intermediate input-output. The other ports p4 to p6 are coupled to the RF fluid reservoir.

Dans ce cas, l'électrovanne EV1 peut prendre soit un premier état ouvert associé à l'état débrayé et dans lequel le fluide circule entre les première P1 et seconde P2 parties et le réservoir de fluide RF mais ne circule pas entre l'entrée-sortie intermédiaire ESI et le réservoir de fluide RF, soit un second état associé à l'état bloqué et dans lequel le fluide circule du réservoir de fluide RF vers les première P1 et seconde P2 parties de la chambre CH via respectivement les premier MA1 et second MA2 moyens anti-retour et circule entre l'entrée-sortie intermédiaire ESI et le réservoir de fluide RF.In this case, the solenoid valve EV1 can take either a first open state associated with the disengaged state and in which the fluid circulates between the first P1 and second P2 parts and the fluid reservoir RF but does not circulate between the inlet- intermediate outlet ESI and the fluid reservoir RF, i.e. a second state associated with the blocked state and in which the fluid circulates from the fluid reservoir RF to the first P1 and second P2 parts of the chamber CH via respectively the first MA1 and second MA1 MA2 non-return means and circulates between the intermediate inlet-outlet ESI and the fluid reservoir RF.

De plus, le circuit de contrôle CC place l'électrovanne EV1 soit dans le premier état ouvert lorsque les moyens d'action MAC doivent être placés dans l'état débrayé, soit dans le second état lorsque les moyens d'action MAC doivent être placés dans l'état bloqué. Par conséquent, dans l'état débrayé, le fluide circule entre les ports p1 et p4 et entre les ports p2 et p5, et donc entre les première P1 et seconde P2 parties de la chambre CH et le réservoir de fluide RF, mais il ne peut pas circuler entre les ports p3 et p6 afin d'interdire sa circulation entre l'entrée-sortie intermédiaire ESI et le réservoir de fluide RF.In addition, the control circuit CC places the solenoid valve EV1 either in the first open state when the means of action MAC must be placed in the disengaged state, or in the second state when the means of action MAC must be placed in the blocked state. Consequently, in the disengaged state, the fluid circulates between the ports p1 and p4 and between the ports p2 and p5, and therefore between the first P1 and second P2 parts of the chamber CH and the fluid reservoir RF, but it does not cannot circulate between the ports p3 and p6 in order to prohibit its circulation between the intermediate input-output ESI and the fluid reservoir RF.

Dans l'état bloqué, le fluide circule du port p4 vers le port p1 via le premier moyen anti-retour MA1, du port p5 vers le port p2 via le second moyen anti-retour MA2, et librement (dans les deux sens) entre les ports p3 et p6 et donc l'entrée-sortie intermédiaire ESI est directement couplée au réservoir de fluide RF.In the blocked state, the fluid flows from port p4 to port p1 via the first non-return means MA1, from port p5 to port p2 via the second non-return means MA2, and freely (in both directions) between the p3 ports and p6 and therefore the intermediate input-output ESI is directly coupled to the fluid reservoir RF.

Dans chacun des exemples d'agencement décrits ci-avant, les moyens d'action MAC peuvent être placés dans l'état bloqué quelle que soit la position du piston PI, ce qui est particulièrement avantageux. Mais, si ce placement dans l'état bloqué à lieu au moment où le piston PI n'obstrue pas l'entrée-sortie intermédiaire ESI, le piston PI va rejoindre automatiquement une position d'équilibre à mi-course dans laquelle il obstrue l'entrée-sortie intermédiaire ESI. C'est ce que l'on appelle un auto-centrage.In each of the exemplary arrangements described above, the means of action MAC can be placed in the blocked state regardless of the position of the piston PI, which is particularly advantageous. But, if this placement in the blocked state takes place at the moment when the piston PI does not obstruct the intermediate input-output ESI, the piston PI will automatically reach a position of equilibrium at mid-travel in which it obstructs the intermediate input-output ESI. This is called self-centering.

On notera également que le réservoir de fluide RF et/ou les premier MA1 et second MA2 moyens anti-retour et/ou chaque électrovanne EVk et/ou les conduits peu(ven)t être externe(s) au carter CR définissant la chambre CH, comme illustré sur les figures 3 à 7, ou bien peu(ven)t être logés dans un éventuel autre carter dans lequel est également logé le carter CR définissant la chambre CH.It will also be noted that the fluid reservoir RF and/or the first MA1 and second MA2 non-return means and/or each solenoid valve EVk and/or the conduits can be external to the housing CR defining the chamber CH , as shown in the figures 3 to 7 , or else little (Fri) t be housed in a possible other casing in which is also housed the CR casing defining the CH chamber.

On notera également que lorsque le véhicule automobile comprend deux trains, chacun d'entre eux peut être équipé d'un dispositif anti-dévers DA selon l'invention.It will also be noted that when the motor vehicle comprises two trains, each of them can be equipped with an anti-roll device DA according to the invention.

L'invention offre plusieurs avantages, parmi lesquels :

  • une possibilité de placer les moyens d'action dans leur état boqué quelle que soit la position en cours du piston,
  • une simplification de l'installation du dispositif anti-dévers et de l'algorithme de génération de commande du fait de l'utilisation d'une seule électrovanne (ou de deux électrovannes fonctionnant en même temps et de façon identique avec la même commande) par train de roues et donc d'un seul faisceau électrique d'alimentation et de contrôle,
  • une diminution du nombre de capteurs nécessaires et de la complexité de l'algorithme contrôlant l'état bloqué,
  • une diminution du risque de panne ou de dysfonctionnement lorsqu'une seule électrovanne est utilisée par train de roues.
The invention offers several advantages, including:
  • a possibility of placing the means of action in their blocked state regardless of the current position of the piston,
  • a simplification of the installation of the anti-roll device and of the command generation algorithm due to the use of a single solenoid valve (or of two solenoid valves operating at the same time and in an identical manner with the same command) by wheelset and therefore a single electrical supply and control harness,
  • a reduction in the number of sensors required and the complexity of the algorithm controlling the blocked state,
  • a reduction in the risk of breakdown or malfunction when only one solenoid valve is used per wheel set.

Claims (9)

  1. Anti-roll device (DA) for a train of a motor vehicle, said device (DA) comprising a bar (BA) suitable for being coupled to the right and left wheels of said train via two connecting rods (Bj), characterized in that it comprises i) action means (MAC) forming part of said bar (BA) and comprising a casing (CR) defining a chamber (CH) subdivided into first (P1) and second (P2) parts of variable volumes by a piston (PI) fixedly secured to a rod (T), and comprising first (ES1) and second (ES2) inputs-outputs communicating respectively with said first (P1) and second (P2) parts and an input-output intermediate (ESI) communicating with said first part (P1) or said second part (P2) according to the position of said piston (PI), and taking a disengaged state or a blocked state in any position of said piston (PI) according to respective current accessibility states of said first (ES1) and second (ES2) inputs-outputs and of said intermediate input-output (ESI), and ii) a hydraulic control circuit (CC) and controlling said accessibility states as a function of commands received and in that the bar (BA) comprises a first arm, a first end of which is fixedly secured to the casing (CR), a second arm, a first end of which is secured to the rod (T) of the piston (PI), the rod (T) being able to translate relative to the casing (CR), the second ends of the first and second arm each being connected to a link.
  2. Device according to claim 1, characterized in that said control circuit (CC) comprises i) first (MA1) and second (MA2) non-return means each coupled to at least one of said first (ES1) and second ( ES2) intermediate inputs-outputs and input-output (ESI), ii) at least one solenoid valve (EVk) coupled to at least one of said first (ES1) and second (ES2) intermediate input-outputs and input-output (ESI) ), and possibly to at least one of the first (MA1) and second (MA2) non-return means, and placed either in a first state imposing said disengaged state, or in a second state imposing said blocked state, and iii) a fluid reservoir (RF) compensating at least the variations in volume induced by movements of said piston (PI).
  3. Device according to claim 2, characterized in that said control circuit (CC), on the one hand, couples i) said first input-output (ES1) to said fluid reservoir (RF) via said first non-return means (MA1), allowing only a passage of fluid from said fluid reservoir (RF) to said first inlet-outlet (ES1), and via a first solenoid valve (EV1) mounted in parallel with said first non-return means (MA1) and able to take either a first open state associated with said disengaged state, or a second closed state associated with said blocked state, ii) said second input-output (ES2) to said fluid reservoir (RF) via said second non-return means (MA2), allowing only one passage of fluid from said fluid reservoir (RF) to said second inlet-outlet (ES2), and via a second solenoid valve (EV2) connected in parallel with said second non-return means (MA2) and able to take either a first open state associated with said state disengaged, either a second closed state associated with said blocked state, and iii) said intermediate input-output (ESI) to said fluid reservoir (RF), and, on the other hand, places said first (EV1) and second (EV2) solenoid valves in either said first open state to place said said solenoid valves action means (MAC) in said disengaged state, or in said second closed state to place said action means (MAC) in said blocked state.
  4. Device according to claim 2, characterized in that said control circuit (CC), on the one hand, couples i) said first input-output (ES1) to said fluid reservoir (RF) via a first solenoid valve (EV1) comprising said first non-return means (MA1), allowing only a passage of fluid from said fluid reservoir (RF) to said first inlet-outlet (ES1), and being able to take either a first open state associated with said disconnected state, or a second defined state by said first non-return means (MA1) and associated with said blocked state, ii) said second input-output (ES2) to said fluid reservoir (RF) via a second solenoid valve (EV2) comprising said second non-return means (MA2) , allowing only a passage of fluid from said fluid reservoir (RF) to said second inlet-outlet (ES2), and being able to take either a first open state associated with said disengaged state, or a second state defined by said second non-return means (MA2) and associated with said blocked state, and iii) said intermediate inlet-outlet (ESI) to said fluid reservoir (RF), and, on the other hand, places said first (EV1) and second (EV2) solenoid valves in either said first open state to place said actuating means (MAC) in said disengaged state, or in said second state to place said means of action (MAC) in said blocked state.
  5. Device according to claim 2, characterized in that said control circuit (CC), on the one hand, couples i) said first (ES1) and second (ES2) inputs-outputs to said fluid reservoir (RF) via a solenoid valve ( EV1) with at least three ways and comprising said first (MA1) and second (MA2) non-return means, allowing only a passage of fluid from said fluid reservoir (RF) to respectively said first (ES1) and second (ES2) inlets - outputs, and being able to take either a first open state associated with said disconnected state, or a second state defined by said first (MA1) and second (MA2) non-return means and associated with said blocked state, and ii) said intermediate input-output (ESI) to said fluid reservoir (RF), and, on the other hand, places said solenoid valve (EV1) either in said first open state to place said actuating means (MAC) in said disengaged state, or in said second state to place said means of action (MAC) in said blocked state.
  6. Device according to claim 2, characterized in that said control circuit (CC), on the one hand, couples said first (ES1) and second (ES2) inputs-outputs and said intermediate input-output (ESI) to said fluid reservoir (RF) via a six-way solenoid valve (EV1) and i) comprising said first (MA1) and second (MA2) non-return means, allowing only a passage of fluid from said fluid reservoir (RF) to said first (ES1) respectively ) and second (ES2) inputs-outputs, and ii) being able to take either a first open state associated with said disengaged state and in which said fluid circulates between said first (P1) and second (P2) parts and said fluid reservoir (RF) but does not circulate between said intermediate input-output (ESI) and said fluid reservoir (RF), a second state associated with said blocked state and in which said fluid circulates from said fluid reservoir (RF) to said first (P1) and second (P2) parts via respectively lesdi ts first (MA1) and second (MA2) non-return means and circulates between said intermediate input-output (ESI) and said fluid reservoir (RF), and, on the other hand, places said solenoid valve (EV1) either in said first open state to place said action means (MAC) in said disengaged state, or in said second state to place said action means (MAC) in said blocked state.
  7. Device according to one of the preceding claims, characterized in that said casing (CR) and piston (PI) define a pallet jack or a screw jack.
  8. Device according to claim 7, characterized in that the screw jack is a ball screw jack.
  9. Motor vehicle comprising at least one train comprising right and left wheels, characterized in that it further comprises at least one anti-roll device (DA) according to one of the preceding claims, and coupled to said right and left wheels of this train.
EP18772849.8A 2017-09-12 2018-08-27 Motor vehicle wheelset anti-roll device with actuating means operated by a hydraulic control circuit Active EP3681740B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1758458A FR3070901B1 (en) 2017-09-12 2017-09-12 ANTI-ROLLER DEVICE WITH MEANS OF ACTION PILOT BY A HYDRAULIC CONTROL CIRCUIT, FOR A MOTOR VEHICLE TRAIN
PCT/FR2018/052106 WO2019053351A1 (en) 2017-09-12 2018-08-27 Motor vehicle wheelset anti-roll device with actuating means operated by a hydraulic control circuit

Publications (2)

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EP3681740A1 EP3681740A1 (en) 2020-07-22
EP3681740B1 true EP3681740B1 (en) 2022-03-16

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EP18772849.8A Active EP3681740B1 (en) 2017-09-12 2018-08-27 Motor vehicle wheelset anti-roll device with actuating means operated by a hydraulic control circuit

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US (1) US11279200B2 (en)
EP (1) EP3681740B1 (en)
CN (1) CN111132858B (en)
FR (1) FR3070901B1 (en)
MA (1) MA50236A (en)
WO (1) WO2019053351A1 (en)

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Publication number Priority date Publication date Assignee Title
CN113291114B (en) * 2021-05-25 2022-03-18 东风汽车集团股份有限公司 Semi-active anti-roll structure and control method

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Publication number Publication date
FR3070901B1 (en) 2021-03-12
US11279200B2 (en) 2022-03-22
WO2019053351A1 (en) 2019-03-21
MA50236A (en) 2021-04-28
CN111132858B (en) 2024-03-29
FR3070901A1 (en) 2019-03-15
US20200269649A1 (en) 2020-08-27
CN111132858A (en) 2020-05-08
EP3681740A1 (en) 2020-07-22

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